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1. A 64.0-kg person holding two 0.750-kg bricks stands on a 2.20-kg skateboard. Initially, the skateboard and the person are at rest. The person now throws the two bricks at the same time so that their speed relative to the person is 15.0m/s .
a) What is the recoil speed of the person and the skateboard relative to the ground, assuming the skateboard moves without friction?
Two charges repel each other with a force of 0.1 N when they are 5 cm apart. Find the forces between the same charges
Consider the system described in the example with m1 = 0.51 kg and m2 = 0.40 kg. If F is sufficiently large, it is clear that the block will accelerate to the right. Find the range of F that allows the system to remain at rest
A block with mass m = 4 kg is sinking with constant acceleration aT = 1.9 m/s2 into the ground. The acceleration due to gravity is g = 9.81 m/s2. In what direction is the normal force
One liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g.
A wire (mass = 50 g, length = 40 cm) is suspended horizontally bytwo vertical wires which conduct a current I = 8.0 A, What is the tension in eitherwire
How does this number of calories compare with the number of calories required to vary the same gram of 100 degree C boiling water to 100 degree C steam.
A block of mass m1 = 0.55kg is placed on top of another block of mass m2 =0.91kg, What minimum coefficient of static friction between the two blocks will prevent the upper one from slipping
under controlled darened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 506nm, What is the intensity in W/m^2 deleivered to a rod
A car is traveling with a constant velocity when the driver suddenly applies the brakes, giving the car a deceleration of 3.50 m/s2, what was the magnitude of the car's original velocity
When only a resistor is connected across the terminals of an ac generator (117 V) that has a fixed frequency, there is a current of 0.490 A in the resistor. calculate the impedance of the series combination
Your 70kg friend is standing on the outer edge of a merry go round with moment of inertia 695kg*m^2, what will be the new angular velocity
a 57 kg researcher absorbs 6.3*10^8 neutrons in a workday. The energy of the neutrons is 2.6 MeV. What is the equivalent dosage of the radiation exposure
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